Photodetection and Imaging Applications of BA2MA4Pb5I16 Ruddlesden-Popper Perovskite

Photodetectors serve as a critical link between photonic and electronic systems, playing a key role in the caption, transmission, and processing of information. Low-dimensional Ruddlesden-Popper (RP) perovskites exhibit remarkable environmental stability, minimal ion migration, and tunable structure, offering significant benefits for the development of stable and practical optoelectronic devices. In this work, the liquid-phase perovskite BA2MA4Pb5I16·xCH3NH2 was effectively synthesized by reacting methylamine gas molecules with RP perovskite powder through a solid-gas interaction, eliminating the requirement for high-boiling-point solvents. Photodetectors and pixelated imaging devices were constructed by spin-coating technique. Detectors with outstanding sensitivity for detecting faint light and fast response capabilities was realized, facilitating high-resolution imaging of various objects. This study offers novel insights and approaches to promote the application of perovskite materials in the field of photodetection and imaging.